I transmit herewith a communication from the Secretary of the Interior, dated the 24th instant, and the accompanying letter of the Commissioner of Patents, submitting a supplemental estimate for an appropriation of $52,500 for the employment of twenty-five assistant principal examiners of patents, at an annual salary of $2,100 each. The matter is commended to the consideration of Congress. CHESTER A. ARTHUR. EXECUTIVE MANSION, _March 28, 1882_. _To the Senate and House of Representatives_: I transmit herewith a communication from the Secretary of the Navy, with accompanying papers, on the subject of purchasing from the American Wood Preserving Company the machinery which was erected by that company at the navy-yard, Boston, under contract with the Navy Department, for the purpose of fully testing the company's process of preserving timber for use in the Navy. The attention of Congress is invited to the subject. CHESTER A. ARTHUR. EXECUTIVE MANSION, _March 28, 1882_. _To the House of, Representatives_: I transmit herewith, in response to the resolution of the House of Representatives of yesterday, the 27th instant, a report of the Secretary of State, with accompanying papers, touching the negotiations for the restoration of peace in South America. CHESTER A. ARTHUR. WASHINGTON, _March 28, 1882_. _To the Senate of the United States_: I transmit to the Senate, for its consideration with a view to ratification, a convention for the protection of trade-marks, concluded between the United States and His Majesty the King of Roumania on the 7th of October, 1881. CHESTER A. ARTHUR. EXECUTIVE MANSION, _March 29, 1882_. _To the Senate and House of Representatives_: I transmit herewith a communication from the Secretary of the Interior, dated 24th instant, in relation to the urgent necessity for action on the part of Congress for the prevention of trespasses upon Indian lands, with copy of report from Commissioner of Indian Affairs upon the subject and draft of bill for the object indicated. The subject is commended to the consideration of Congress. CHESTER A. ARTHUR. EXECUTIVE MANSION, _March 29, 1882_. _To the Senate and House of Representatives_: I transmit herewith, for the consideration of Congress, a communication from the Secretary of War, dated March 25, 1882, with accompanying correspondence, plans, and estimates, in which he recommends an appropriation of $40,000 for the completion of the new post at Fort Lewis, Colo. CHESTER A. ARTHUR. EXECUTIVE MANSION, _March 30, 1882_. _To the Senate and House of Representatives_: I transmit herewith a communication from the Secretary of the Interior, dated the 28th instant, and the accompanying letter of the Superintendent of the Government Hospital for the Insane, submitting an estimate for a deficiency appropriation of $20,792.51 for the support of that institution for the remaining portion of the present fiscal year. CHESTER A. ARTHUR.